ps_mem – Simple Python script for accurate Reporting on core memory usage on Linux

ps_mem is a simple Python script that allows you to get a core memory usage accurately for the programs in Linux.

There are many applications on Linux to view memory usage such as free command, VMstat command, Smem command and Top command.

But this application is slightly different when compared to the others because it accurately displays the core memory usage.It calculates the amount of private and shared memory against to a program and gives the total amount of RAM used.

This will surely help everyone to understand which program consumes more RAM.

You can install the ps_mem application in a number of ways, either through the Distribution Package Manager or through the PIP Package Manager or direct method (by running the ps_mem.py Python script).

Please note,  It needs a root privilege.

Method-1: How to install the ps_mem application on Linux using Distribution Package Manager

The RHEL based system has the ps_mem utility in the default repository, so it can be easily installed through the package manager.

For RHEL/CentOS, use yum Package Manager to install ps_mem package.

$ sudo yum install ps_mem

For Fedora/RHEL 8/CentOS 8 systems, use dnf Package Manager to install ps_mem package.

$ sudo dnf install ps_mem

For Arch Linux, use pacman Package Manager to install ps_mem package.

$ sudo pacman -S ps_mem

Method-2: How to install the ps_mem package on Linux using the PIP Package Manager

PIP is a recommended tool for installing Python packages on Linux. Use the pip command instead of the distribution package manager to get the latest build of ps_mem package.

Make sure you have the pip package installed on your system to use the pip Package Manager. If this is not already installed, install the python-pip package using the distribution Package Manager.

For Debian based systems.

$ sudo apt-get install python-pip

For RHEL/CentOS based systems.

$ sudo yum install python-pip

For Fedora

$ sudo dnf install python-pip

For openSUSE

$ sudo zypper install python-pip

For Arch Linux based systems

$ sudo pacman -S python-pip

Finally use the pip Package Manager to install the ps_mem package on Linux.

$ sudo pip install ps_mem

Method-3: How to use ps_mem.py Python script directly on Linux

Alternatively, you can run the ps_mem.py script directly by downloading the file from the developer github page.

$ git clone https://github.com/pixelb/ps_mem.git && cd ps_mem
$ sudo python ps_mem.py

How to use ps_mem command in Linux ?

Run the ps_mem command without any option to get the core memory usage accurately for per program.

$ sudo ps_mem
             
 Private  +   Shared  =  RAM used	Program

168.0 KiB +  29.0 KiB = 197.0 KiB	xf86-video-intel-backlight-helper (2)
188.0 KiB +  66.0 KiB = 254.0 KiB	cat (2)
308.0 KiB +  37.5 KiB = 345.5 KiB	lvmetad
380.0 KiB +  32.5 KiB = 412.5 KiB	rtkit-daemon
392.0 KiB +  26.5 KiB = 418.5 KiB	crond
832.0 KiB + 112.0 KiB = 944.0 KiB	gnome-session-ctl (2)
968.0 KiB +  55.5 KiB =   1.0 MiB	gvfs-mtp-volume-monitor
  1.1 MiB +  40.5 KiB =   1.1 MiB	dconf-service
  1.0 MiB + 102.5 KiB =   1.1 MiB	gvfs-goa-volume-monitor
  1.0 MiB + 178.5 KiB =   1.2 MiB	gvfsd
  1.1 MiB + 139.5 KiB =   1.3 MiB	fprintd
  1.2 MiB +  49.5 KiB =   1.3 MiB	gvfsd-fuse
  1.2 MiB + 208.0 KiB =   1.4 MiB	xdg-permission-store (2)
  1.2 MiB + 173.5 KiB =   1.4 MiB	gsd-disk-utility-notify
.
.
 19.0 MiB +   1.9 MiB =  20.9 MiB	lollypop-sp
 20.3 MiB +   2.0 MiB =  22.3 MiB	blueman-applet
 18.4 MiB +   3.9 MiB =  22.4 MiB	evolution-calendar-factory
 20.1 MiB +   2.4 MiB =  22.5 MiB	blueman-tray
 15.3 MiB +   7.7 MiB =  23.0 MiB	systemd-journald
 22.3 MiB + 746.0 KiB =  23.1 MiB	gsd-keyboard (2)
 22.4 MiB + 793.0 KiB =  23.2 MiB	gsd-wacom (2)
 23.2 MiB + 930.0 KiB =  24.1 MiB	gsd-xsettings (2)
 15.3 MiB +   8.9 MiB =  24.3 MiB	evolution-alarm-notify
 23.5 MiB +   1.6 MiB =  25.1 MiB	gsd-color (2)
 23.9 MiB +   1.2 MiB =  25.1 MiB	gsd-media-keys (2)
 24.2 MiB +   1.3 MiB =  25.5 MiB	gsd-power (2)
 26.3 MiB +   2.3 MiB =  28.6 MiB	c
 28.6 MiB +   2.1 MiB =  30.7 MiB	chrome-gnome-sh (2)
 48.8 MiB +   6.7 MiB =  55.5 MiB	goa-daemon
 62.3 MiB +   6.4 MiB =  68.7 MiB	WebExtensions
 87.2 MiB +  55.7 MiB = 142.8 MiB	Xorg (2)
210.6 MiB +  25.3 MiB = 235.9 MiB	notepadqq-bin
368.7 MiB +  29.4 MiB = 398.1 MiB	gnome-shell (2)
536.6 MiB + 137.6 MiB = 674.3 MiB	firefox
886.0 MiB + 107.4 MiB = 993.5 MiB	chrome (14)
  2.4 GiB + 183.5 MiB =   2.5 GiB	Web Content (8)
---------------------------------
                          5.7 GiB
=================================

Add the -s option with the ps_mem command to get the full path of the program instead of the program name.

$ sudo ps_mem -s

 Private  +   Shared  =  RAM used	Program

168.0 KiB +  29.0 KiB = 197.0 KiB	xf86-video-intel-backlight-helper intel_backlight (2)
188.0 KiB +  66.0 KiB = 254.0 KiB	cat (2)
308.0 KiB +  37.5 KiB = 345.5 KiB	/usr/bin/lvmetad -f
380.0 KiB +  32.5 KiB = 412.5 KiB	/usr/lib/rtkit-daemon
392.0 KiB +  26.5 KiB = 418.5 KiB	/usr/bin/crond -n
448.0 KiB + 101.5 KiB = 549.5 KiB	less
648.0 KiB +  91.5 KiB = 739.5 KiB	/usr/lib/gdm-x-session gnome-session --autostart /usr/share/gdm/greeter/autostart
648.0 KiB +  91.5 KiB = 739.5 KiB	/usr/lib/gdm-x-session --run-script /usr/bin/gnome-session
.
.
179.7 MiB +  13.2 MiB = 192.9 MiB	/usr/lib/firefox/firefox -contentproc -childID 1 -isForBrowser -prefsLen 1 -prefMapSize 218689 -parentBuildID 20200108131950 -greomni /usr/lib/firefox/omni.ja -appomni /usr/lib/firefox/browser/omni.ja -appdir /usr/lib/firefox/browser 1701 true tab
210.6 MiB +  25.3 MiB = 235.9 MiB	/usr/bin/../lib/notepadqq/notepadqq-bin
234.9 MiB +  12.3 MiB = 247.2 MiB	/usr/lib/firefox/firefox -contentproc -childID 10 -isForBrowser -prefsLen 8049 -prefMapSize 218689 -parentBuildID 20200108131950 -greomni /usr/lib/firefox/omni.ja -appomni /usr/lib/firefox/browser/omni.ja -appdir /usr/lib/firefox/browser 1701 true tab
251.2 MiB +  13.9 MiB = 265.1 MiB	/usr/lib/firefox/firefox -contentproc -childID 7 -isForBrowser -prefsLen 8049 -prefMapSize 218689 -parentBuildID 20200108131950 -greomni /usr/lib/firefox/omni.ja -appomni /usr/lib/firefox/browser/omni.ja -appdir /usr/lib/firefox/browser 1701 true tab
261.6 MiB +  11.5 MiB = 273.1 MiB	/usr/lib/firefox/firefox -contentproc -childID 16 -isForBrowser -prefsLen 8049 -prefMapSize 218689 -parentBuildID 20200108131950 -greomni /usr/lib/firefox/omni.ja -appomni /usr/lib/firefox/browser/omni.ja -appdir /usr/lib/firefox/browser 1701 true tab
273.0 MiB +   9.4 MiB = 282.5 MiB	/opt/google/chrome/chrome --type=renderer --field-trial-handle=14830905625952148903,693558806252868729,131072 --service-pipe-token=10778886472037153786 --lang=en-GB --enable-offline-auto-reload --enable-offline-auto-reload-visible-only --num-raster-threads=4 --enable-main-frame-before-activation --service-request-channel-token=10778886472037153786 --renderer-client-id=6 --no-v8-untrusted-code-mitigations --shared-files=v8_context_snapshot_data:100,v8_natives_data:101
276.8 MiB +  26.8 MiB = 303.6 MiB	/usr/lib/firefox/firefox -contentproc -childID 15 -isForBrowser -prefsLen 8049 -prefMapSize 218689 -parentBuildID 20200108131950 -greomni /usr/lib/firefox/omni.ja -appomni /usr/lib/firefox/browser/omni.ja -appdir /usr/lib/firefox/browser 1701 true tab
334.2 MiB +  12.4 MiB = 346.6 MiB	/usr/lib/firefox/firefox -contentproc -childID 11 -isForBrowser -prefsLen 8049 -prefMapSize 218689 -parentBuildID 20200108131950 -greomni /usr/lib/firefox/omni.ja -appomni /usr/lib/firefox/browser/omni.ja -appdir /usr/lib/firefox/browser 1701 true tab
237.1 MiB + 142.2 MiB = 379.3 MiB	/usr/lib/firefox/firefox -contentproc -childID 18 -isForBrowser -prefsLen 9566 -prefMapSize 218689 -parentBuildID 20200108131950 -greomni /usr/lib/firefox/omni.ja -appomni /usr/lib/firefox/browser/omni.ja -appdir /usr/lib/firefox/browser 1701 true tab
368.6 MiB +  29.4 MiB = 397.9 MiB	/usr/bin/gnome-shell (2)
618.8 MiB +  11.5 MiB = 630.3 MiB	/usr/lib/firefox/firefox -contentproc -childID 4 -isForBrowser -prefsLen 6894 -prefMapSize 218689 -parentBuildID 20200108131950 -greomni /usr/lib/firefox/omni.ja -appomni /usr/lib/firefox/browser/omni.ja -appdir /usr/lib/firefox/browser 1701 true tab
543.1 MiB + 197.9 MiB = 741.0 MiB	/usr/lib/firefox/firefox --new-window
---------------------------------
                          5.8 GiB
=================================

If you want to view the memory usage of a particular program or more than one program, you can see this by adding their PIDs as follows.

$ sudo ps_mem -p 4152,2123,2898

 Private  +   Shared  =  RAM used	Program

129.5 MiB +  13.4 MiB = 142.9 MiB	chrome
210.6 MiB +  25.3 MiB = 235.9 MiB	notepadqq-bin
261.4 MiB + 115.7 MiB = 377.1 MiB	Web Content
---------------------------------
                        755.9 MiB
=================================

Use the following format to print memory consumption every “N” seconds. The following command format reports memory usage every 2 seconds.

$ sudo ps_mem w 2

To show separate memory usage entries by process rather than by program.

$ sudo ps_mem -d

 Private  +   Shared  =  RAM used	Program[pid]

 84.0 KiB +  14.5 KiB =  98.5 KiB	xf86-video-intel-backlight-helper [880]
 84.0 KiB +  14.5 KiB =  98.5 KiB	xf86-video-intel-backlight-helper [1151]
 92.0 KiB +  32.5 KiB = 124.5 KiB	cat [2905]
 96.0 KiB +  33.5 KiB = 129.5 KiB	cat [2906]
308.0 KiB +  37.5 KiB = 345.5 KiB	lvmetad [256]
380.0 KiB +  32.5 KiB = 412.5 KiB	rtkit-daemon [938]
392.0 KiB +  26.5 KiB = 418.5 KiB	crond [657]
416.0 KiB +  53.5 KiB = 469.5 KiB	gnome-session-ctl [1202]
416.0 KiB +  57.5 KiB = 473.5 KiB	gnome-session-ctl [913]
448.0 KiB +  83.5 KiB = 531.5 KiB	less [18316]
428.0 KiB + 118.5 KiB = 546.5 KiB	dbus-daemon [903]
.
.
169.2 MiB +   9.2 MiB = 178.4 MiB	chrome [5111]
210.6 MiB +  25.3 MiB = 235.9 MiB	notepadqq-bin [2123]
235.3 MiB +  15.4 MiB = 250.8 MiB	gnome-shell [1219]
245.2 MiB +  11.6 MiB = 256.8 MiB	Web Content [5034]
268.4 MiB +  10.1 MiB = 278.6 MiB	Web Content [4939]
275.1 MiB +   9.4 MiB = 284.5 MiB	chrome [3076]
297.2 MiB +  13.2 MiB = 310.3 MiB	Web Content [1776]
320.5 MiB +  12.3 MiB = 332.8 MiB	Web Content [4152]
339.4 MiB +  12.4 MiB = 351.8 MiB	Web Content [4241]
380.9 MiB +  70.9 MiB = 451.8 MiB	Web Content [14457]
455.0 MiB +  13.9 MiB = 468.9 MiB	Web Content [3827]
615.3 MiB +  11.5 MiB = 626.9 MiB	Web Content [1955]
559.9 MiB + 109.9 MiB = 669.9 MiB	firefox [1701]
---------------------------------
                          6.1 GiB
=================================

Show swap information of each item (and Shared swap if the kernel supports SwapPss).

$ sudo ps_mem -S

 Private  +   Shared  =  RAM used   Swap used	Program

168.0 KiB +  29.0 KiB = 197.0 KiB     0.0 KiB	xf86-video-intel-backlight-helper (2)
188.0 KiB +  66.0 KiB = 254.0 KiB     0.0 KiB	cat (2)
308.0 KiB +  37.5 KiB = 345.5 KiB     0.0 KiB	lvmetad
380.0 KiB +  32.5 KiB = 412.5 KiB     0.0 KiB	rtkit-daemon
392.0 KiB +  26.5 KiB = 418.5 KiB     0.0 KiB	crond
448.0 KiB +  83.5 KiB = 531.5 KiB     0.0 KiB	less
832.0 KiB + 111.0 KiB = 943.0 KiB     0.0 KiB	gnome-session-ctl (2)
968.0 KiB +  55.5 KiB =   1.0 MiB     0.0 KiB	gvfs-mtp-volume-monitor
  1.1 MiB +  40.5 KiB =   1.1 MiB     0.0 KiB	dconf-service
  1.0 MiB + 102.5 KiB =   1.1 MiB     0.0 KiB	gvfs-goa-volume-monitor
  1.0 MiB + 178.5 KiB =   1.2 MiB     0.0 KiB	gvfsd
  1.2 MiB +  49.5 KiB =   1.3 MiB     0.0 KiB	gvfsd-fuse
.
.
 24.2 MiB +   1.3 MiB =  25.5 MiB     0.0 KiB	gsd-power (2)
 26.3 MiB +   2.3 MiB =  28.6 MiB     0.0 KiB	c
 28.6 MiB +   2.1 MiB =  30.7 MiB     0.0 KiB	chrome-gnome-sh (2)
 48.8 MiB +   6.7 MiB =  55.5 MiB     0.0 KiB	goa-daemon
 65.1 MiB +   6.4 MiB =  71.5 MiB     0.0 KiB	WebExtensions
 87.4 MiB +  55.7 MiB = 143.1 MiB     0.0 KiB	Xorg (2)
210.6 MiB +  25.3 MiB = 235.9 MiB     0.0 KiB	notepadqq-bin
369.0 MiB +  29.4 MiB = 398.3 MiB     0.0 KiB	gnome-shell (2)
559.9 MiB + 109.9 MiB = 669.9 MiB     0.0 KiB	firefox
900.7 MiB + 107.6 MiB =   1.0 GiB     0.0 KiB	chrome (14)
  2.9 GiB + 155.9 MiB =   3.0 GiB     0.0 KiB	Web Content (8)
---------------------------------------------
                          6.1 GiB     0.0 KiB
=============================================

To display only the total number of bytes for the selected processes

$ sudo ps_mem -t
6644320768

You may also like...